<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
		  <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
		  </swiper-item>
		</swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">{{goods_info.price}}</view>
      <!-- 商品信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名字 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏图标 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
        <!-- 运费 -->
        <view class="yf">快递: 免运费</view>
        <!-- 富文本内容 -->
        <rich-text :nodes="goods_info.goods_introduce"></rich-text>
      </view>
    </view>
	</view>
  <!-- 商品导航区域 -->
  <view class="goods_navs">
    <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
  </view>
</template>

<script>
  import { mapState, mapMutations, mapGetters } from 'vuex'
  
	export default {
    computed: {
      ...mapState('m_cart', []),
      ...mapMutations('m_cart', ['addToCart']),
      ...mapGetters('m_cart', ['total']),
    },
		data() {
			return {
				goods_info: {},
        // 左侧按钮的配置对象
        options: [{
          icon: 'show',
          text: '店铺'
        },{
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        // 右侧按钮的配置对象
        buttonGroup: [{
          text: '加入购物车',
          backgroundColor: '#ff0000',
          color: '#fff'
        },{
          text: '立即购买',
          backgroundColor: '#ffa200',
          color: '#fff'
        }]
			};
		},
    onLoad(options) {
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods: {
      async getGoodsDetail (goods_id) {
        const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', {goods_id})
        if(res.meta.status !== 200) return uni.$showMsg()
        // 图片底部空白间隙的问题加将图片转换成block属性
        // 图片无法在ios设备显示的问题
        res.message.goods_introduce = res.message.goods_introduce.splice(/<img /g, '<img style="display: block;" ').splice(/webp/g, 'jpg')
        
        this.goods_info = res.message
      },
      // 点击图片预览
      preview(i) {
        // 预览图片的方法
        uni.previewImage({
          // 预览时默认显示图片的索引
          current: i,
          // 所有预览图片的数组地址
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onClick(e) {
        if(e.content.text === '购物车') {
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        if(e.content.text === '加入购物车') {
           // 组织一个商品的信息对象
          const goods = {
            goods_id: this.goods_info.goods_id,       // 商品的Id
            goods_name: this.goods_info.goods_name,   // 商品的名称
            goods_price: this.goods_info.goods_price, // 商品的价格
            goods_count: 1,                           // 商品的数量
            goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
            goods_state: true                         // 商品的勾选状态
          }
          
          this.addToCart(goods)
        }
      }
    },
    watch: {
      // total(newVal) {
      //   const findResult = this.options.find(x => x.text === '购物车')
      //   if(findResult) {
      //     findResult.info = newVal
      //   }
      // }
      total: {
        // 侦听器处理函数
        handler(newVal) {
          const findResult = this.options.find(x => x.text === '购物车')
          if(findResult) {
            findResult.info = newVal
          }
        },
        // 监听侦听器初次加载页面时是否立即调用
        immediate: true
      }
    }
	}
</script>

<style lang="scss">
swiper {
  height: 750rpx;
  
  image {
    width: 100%;
    height: 100%;
  }
}

.goods-info-box {
  padding: 10px;
  padding-right: 0;
  
  .price {
    margin: 10px 0;
    font-size: 18px;
    color: #C00000;
    
    .goods-info-body {
      display: flex;
      justify-content: space-between;
      
      .goods-name {
        font-size: 13px;
        margin-right: 10px;
      }
      
      .favi {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 120px;
        border-left: 1px solid #efefef;
        font-size: 12px;
        color: gray;
      }
      
      .yf {
        margin: 10px 0;
        font-size: 12px;
        color: gary;
      }
    }
  }
}

.goods_navs {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
}

.goods-detail-container {
  padding-bottom: 50px;
}

</style>
